Example For Configuring Basic Rstp Functions - Huawei Quidway S7700 Configuration Manual - Ethernet

Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet
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8.7.2 Example for Configuring Basic RSTP Functions

This example shows how to configure basic RSTP functions.
Networking Requirements
On a complex network, loops are inevitable. With the requirement for network redundancy
backup, network designers tend to deploy multiple physical links between two devices, one of
which is the master and the others are the backup. Loops are likely or bound to occur in such a
situation.
Loops will cause broadcast storms, thereby exhausting network resources and paralyzing the
network. Loops also cause flapping of MAC address tables and damage MAC address entries.
RSTP can be deployed on a network to eliminate loops by blocking some ports. On the network
shown in
loops on the network by exchanging information with each other, they trim the ring topology
into a loop-free tree topology by blocking a certain port. In this manner, replication and circular
propagation of packets are prevented on the network and the switching devices are released from
processing duplicated packets, thereby improving their processing performance.
Issue 01 (2011-07-15)
#
stp mode
stp
#
interface GigabitEthernet1/0/2
stp disable
#
return
Configuration file of SwitchC
#
sysname
SwitchC
#
stp mode
stp
#
interface
GigabitEthernet1/0/1
stp instance 0 cost
20000
#
interface
GigabitEthernet1/0/2
stp disable
#
return
Configuration file of SwitchD
#
sysname
SwitchD
#
stp mode
stp
stp instance 0 root
secondary
#
return
Figure 8-4, after SwitchA, SwitchB, SwitchC, and SwitchD running RSTP discover
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8 STP/RSTP Configuration
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